Plant fossils were first recorded in Indiana by David Dale Owen in l843. Lesquereux's "Description of the Coal Flora of the Carboniferous Formation in Pennsylvania and Throughout the United States," published in 1880, ...

In this report the significance of spores in plant life cycles is discussed briefly. The term “miospore” is proposed for fossil spores and spore-like bodies under 200 micra in size. Sampling and coal preparation are outlined, ...